Safety-guard for stamping and other presses.



APPLICATION FILED JUNE 21 1912.

Patented Oct. 29, 1912.-

LOQQAQ.

HES-Emu S v/l/liflllll'llllli'l!!! Witnesses:

- vide means whereby the and its appurtenant parts as JAMES MELVIN 3' ONES, 01E HAMILTON, ONTARIO, CANADA.

SAFETY-GUARD FDR STAMPING AND OTHER PR'ESSES.

Specification of batters Patent.

Application filed June 21,

Patented @ct. 2%,1'912.

1912. Serial No. 7G5,110.

To all 'ur/z am, it may concern Be it known that l, Janus a citizen of the Dominion oi Ganacla,-residing at 150 Dundurn street, in the city of Hamilton, in the county of Nentworth, in the Province of Ontario, Dominion of Canada, have invented a certain new and useful Safety-Guard for Stamping and other Presses, 0t which the following is a specification. 7

This invention relates to safety guards for stamping and other presses for preventing injury to the hands of the operator, and it has more particular reference to that type of device described in the specification or" ,my former U. S. Patent No. 1020827, dated March 19th, 1912.

Safety guards of the type referred to comprise a guard carrying member, a manually operable member connected to the guard carrying member and a latch releasing member, said' guard carrying member being independently to the latch releasing member, until the guard is moved substantially to its protective position, additional movement of the guard carrying member serving to actuate the latch releasing member.

The main object of my present invention is to provide a simple and ei'li'ective means whereby the guard is positively prevented from lifting away from its protective position should the latch not be returned to-its locked position.

Another object of the MELVIN Jones,

full tension of the springs returning the guard carrying memher and the latch releasing member are exerted to retain the latch in its locked position-when'the device is at rest.

These and other objects are attained by the mechanism illustrated on the accompanying sheet of drawings and'the novel features whereof are particularly pointed out by the appended claims.

In the drawings, Figure 1, is a side elevation of my improved safety guard attachmerit and as applicable for fitment on an movable with relation invent-ion is to .pro-.

ordinary power driven stamping-press, only suchf parts being illustrated as are essentia for a full. understanding of the invention. Fig. 2, is a plan. of the same; Fig. 8, is a vertical section through the butler device fully. described.

' entire device.

of movement of the spindle 5,

hereinafter Like reference characters designate the same parts in the several. figures.

1, is abraclret for attachment to the side of the press frame by means of set. screws or bolts passed through the holes 2', '22: and at the upper end of the bracket 1,tor example-l form a bearing 3, in which is securely fixed by set screw 4, one end of a horizontally disposed spindle 5, which serves as the iu um and support for the oosely mounted on the aforesaid spindle 5, is a bearing sleeve 6, provided with a colt-shaped part 7, which serves asv a housing for the guard carrying member or lever 8, said lever being adapted for longitudinal adjustment relative to the spindle 5, and fixture in site, by means of a set screw 9. In other words, by slackening the set screw 9, thelever may be moved longitudinally of its axis in order to position the guard accurately relative to the front face of the dies, which are not shown as they form no part of the present invention.

Forward of the box shaped part 7, and on the lever S, is mounted sleeve or block 10, which is fixed in its properly adjusted position by a set screw ii, and this said sleeve or block 10, is provided at its lower end with an obliquely arranged lug 12, to which is hingedly connected by a fork 13, the upper end. 0t a connecting rod 1d. The lower end of the connecting rod 14, is coupled to the foot lever or treadlenotshown-in a similar manner to that described in my former U. S. Patent No. 977953, dated December 6th, A. D. 1910, and I wish it particularly noted that by forming the lug 12, obliquely as set forth, provision is made.when desired-t0 bring the centers and connect ing rod 14, closely together, by reversing the direction of said lug to that shown.

15, is a box-shaped sleeve or block clamped by means of a set screw 1am or near the rear end of the lever 8, and it is also provided at its lower side with an obliquely disposed lug 17, to which is con nected a strong tension spring 18, the free end whereof is conveniently attached by any appropriate'means to the side of the press frame. Thus itwill be seen that the spring 1.8, normally holds the guard carrying lever @{3,'in its elevated position-as shownand it is designed to counterbalance the weight thereof. At: or near the opposite (iiforward end of the lever 8, is mounted further boxshaped bracket 19, secured in adjusted'position ,bymeans of a set screw 20,

and at one side thereof is a substantially vertical slot 21, in which is clamped by a set screw 22, a depending arm' or bar 23, car-' ryingat its lower end the guard or protec ti've device'proper, and which may be-of any appropriate shape or requirements. a

pattern according to.

Loosely mounted-on the spindle 5, between thebearing 3, and the sleeve"6,'for eXam- .-.ple- -.is a second sleeve 24, having formed at its loivver side 'a box-shaped part 25,111

which is clamped by a set screw 26, an auxiliary lever or latch-releasing member 27, u arranged for vertical oscillation in a plane 5 parallel with that traversed byth'e'leV'erS, and. at a slight distance therefrom. At or .20 by a set screw 28,'a box-shaped sleeve 01" near the rearend'of the lever 27, is clamped block 29, pr0vided with an ohliquely turned depending lug 30,. to which-is connected a tension spring 31, attached at its lower end I 1 treme front] end of the lever 27, 1s plvotally to: the side of the press frame. To thev exjconnected by a pin '32, the forked lower secured .at its end.33, of a compound connecting rod 34, upper end tothe releasing latch of-the' press .35, is a block sleeve clamped on the lever :27, by set screws, 36, 37,-see* Fig; 3'forward of the sleeve '10, aforesaid, and at one side thereof is provided asenii-cylindrical under the control of a com 39', This plunger 38, adapted to contact with a bumper stop40, Fig. 1, on'the side of shaped part-in which is fitted a plunger, 38,

the pressframe ands'ervesas-a means; for preventing hammering of theguard or protective device'u'pon the bed] of the :press,

. and also fora purpose hereafter/explained.

a hardened steel angle inset 42, for the purthreaded to receive an axial pose-hereafter explained. The upper end f i he yoke 41, is

- adjusting screw 43, which-limits the upward lift of :the guard carrying lever 8, and it also serves for another urpose' hereafter eX- 44, is alock-nut forsecuring the screw 43, in its adjusted position.

- n on the upper end of the plunger 38, I

thread a collar 45, furnished on its circumferential surface with a laterally projecting ,pin 46, fitting into a 'hole provided forits "reception in an ear or extension of latch -1' 47 pivoted ,on a headed '65 I pin 48, passed through a bore on the heel of the yoke 41,

ression j's'pring' absorber and f plained, and

. words, the nose "jectecl over they and threaded through the depending limb of the aforesaid angle inset 42. Thus it will be seen thatwhile theheaded pin 48, serves as a pivot' tfor the latch 47., it also holds the angle inset 42, securely in position.v

49,Fig. lfi's a lock nut forfirmly locking .the parts 42, and'47, together.

50,51, arehardened steel strips disposed f on the upper 'and lovtreredges of the lever 8,

and they iar-e; held-"in position by} a b0X- lever .8,-'bythefrapid hammering ofnthe lower end of. the screw 43, and the inset 42, thereaga-inst. This feature I; have' found shaped sleeve 52, andsetlscrew '53; and

vtheir purpose is to" prevent damage tov said In "use and assuming the operator presses the 'foot lever or vt'readle I thereby ex;v 1

erting-a downward pull on thejcoiniectingfront of the dies .til'l thej strip 51,- on the underside. of the lever 8,; contactsv with the inset 42.- At this point if-the device is ac-' curately adjusted the guard proper will. he 'i in its preventive position relative to the dies.

Further "downwardpressure on; the foot lover or treadle will couple thelevers 8, and 27, together through the'rhediumofthe block sleeve 35, when apull willhe exerted on the connecting-rod 34, and; the latch will be released, whereupon the press plunger will be left free to descend-or'perfo1'n1 its effective movement, ';Actual release of the latclrwill only take'pla'ce if the device is properlyadjusted whe'nfthe lower end of the spring controlled plunger 38, contactswith thelbumperstop 40, and it .is to be rod 14, the guard proper will he'lowered in T85 particularly noted that I always limit the travel or. up and'down oscillatory movement :of. the lever 27,- with reference to said bumper stop-to a1 length-infexcess of the travel of the latch. Forsexample if thelatch v has a half inch travelth'e movement of the lever 27, with relation to the bumper stop 40, Wllljbfi in excess'thereof in order that the spring controlled plunger 38, may effectively perform its function of a shock forthe purpose now to'be eximmediately the, lower end of the plunger 38, contacts with the bumper stop 40, and is thereby upwardly projected it will be clearly seen that thelatchl47, will be moved on its pivot 48, in the direction of thearrow 54, shown on Fig.

55, of said latch will be proupper'face or edge of the top strip-50. Immediately the operator removes the downward pressure of his foot on the" treadle the latch releasing level, 27 ,ajnd guard carrjpng lever 8, Wlll be returned under the action of the springs 31,18. re-

spectively. Should, however,-the latch stick or fail to instantly return from some unforeseen eventuality, to its normal or locked po- 3; or in other great" Importance-end a eat a e-1n: the life of the lever 8.

' ,erable means I sit-ion, it will be readily seen that ii e lsteh' as above set fert le-the action of 'spi" 1 g \vill be added or coupled to "has 01' the spring 431, and assist in firmly forcing latch into its 'iocking position to stop the further descent of lever is again depressed. This feature 1 have found of great importance end veins as it counteracts any lisbi i to accidents consequent upon the wear and tee-r oi the latch nose in rapidly opersiiing machines.

From the foregoii no gig ,3! b sti'nctlon.

the deteiis' of com the plunger n-"nril the foot its limits @bviously Well as the arrangement and conic the various parts may be variously n iied withoutin any way departing Efrem spirit and scope of the invention and it 155 intended to include all such within the pres ent application. Having thus described device end its! advantages, What I claim es novel end desire to secure by Letters Pei/ens, is-:- 1. In a, safety guard the character described, combins iion wieh guard cs1- rying 'meml'ier, of a new releasing member, said guard carrying 'm-ember having a lost motion connection with the leech releasing membeiy b'ut engaging and seizing against said latch releasing member, at its limit of movement in both directions. r 2. In a press'gusrd of the cheescter described, the combination with guardcsrrying member, of a latch releasing menisci, means for sctusting said guard carrying member in one direciio'n and manually 0p "or actuating the guard carrying member in the opposite direction, said usrd carrying member hsving a limitedin dependent movement wiih releiicn to the latch releasing member, bui engeg-ing and acting upon lsich releasing member atthe limit of such independent movement in both directions.

In a press guard of the cheracier' described, the combination with a guard cerrying member, of s latch releasing member, manually operable member for moving the gee-rd coir member to nrozecti /o [the 158118101110? said spring,

sition, spring means resisting such movement of the guard carrying member i0 protective position, and latch releasing. menibcr, said guard carrying membe1' hsvmg a iimi'ted lost motion engz'igmment "with the latch releasing membei'", but engaging and ac-ting upon said latch releasing member at each oi? its limits of movement.

' "i. w device "of she character described, the combination with a guard carrying membr, leech *releesing member and s yoke carried by the latch releasing member which guard carrying member passes, said guard cerry'inggnember acting up 1 the i'secli releasing member at each of nits oi movemens. in s, de'vi'e of the character described,

fbinetmn Wi i s carrying of a latch Telessmg member and a by the latch releasing" member h the guard carrying member passes, sai euerd carryingseeing pen the l on releasing member at each of movemeni, and spring means tending to move the guard cs1: lever out protective position,

*8. In apress of the character described, combination with a guard car'- rving member, of latch releasing member, goerd ceiieying member and actuating limit of iss movement to protective position,

as, h i L A. Su i.

and means for lockin the nerd cerr in a 6 Member into engagement with the latch releasing member until the lei-ch releasing member llfiS returned to a position "to latch the press mechanism against operation.

'7. In a device of ibe chsrscser described, the combination with a "guard carrying member, of a latch releasing 11 ember, spring means tending to move iilie guard carrying member so nsprotec' cive position, manually operable mes-ms for, moving the guard carrying member to protective position against spring means for moving the isbclvreleesmg member to a, posi'tion to hold the press mechanism againstsc'ticn, said "guard carrying member engaging 'the press releasing member and actuating the same at the limit of movement, oi said carrying member to proiective position, and means for-locking the guiu'd carrying member into engagement with the latch releasing member until the hitch releasing member moves sufficiently to latch the press mechanism against operation.

'8. In a press guard of the charsctendescribed, the combination with s pivoted spring actuated guard carrying lever, of a pivoted spring actuated latch controlling lovely, by'the latchcontrolling 4 limit of. movement in both directions.

said latch releasing member at the 9. In a press guard of the character-described, the combination witha. plvot'ed spring actuated guard carrying lever, of a pivoted spring actuated latch controlling lever, a yoke carried by the latch control ling lever and through which the guard carrying lever passes, sald guard carrying lever engaging and actuating upon sald yoke at its limit of movement in both directions, and anadjustable member forming a part of said yoke and with rying lever contacts.

10. In a device of which said guard carrying lever, of a pivoted latch releasing lever, spring means. actuating both of'said levers in one direction,

means for actuating the guard carrying lever against the tension of its spring means,

said 'guardcarrying-lever in turn engaging and actuating. .the latch releasing leveragainst the tenslon'of its actuatingspring, a catch carried by the latch, releasing lever, a'fixed member carried by the press frame and actuating means'tor said latch adapted to contact with said fixed member When the latch-"releasing lever is moved,=said catch at I such timee'ngagmgand holding: the guard carrying lever in protected position. i 11.

In, a press guard, of the character de scribed, the combination With a support, of

I a guardcarrying lever pivoted upon said support, a press controllinglever likewise .p1voted upon said support, spring means .norinally tending tomove the'press controlg ver t he (1 t the press against action, spring means normallyte'nding tomove the guard carrying lever to unprotected posif lever. pas'ses, 'a catch pivoted lever reaches its downward limit-of nl'ove-v ment the contact of said plunger"wi-th saidstop' moving'said catch tohold the guard carrying lever 1n protectedposition until the press controlling lever moves upward sufiiciently to release said catch.

12. In a device of the character described,

' "the combination with a'guard carrying 1ever, offa press controlling lever and a' yoke the character described,- the combination with a pivoted guardcar manually operable I yer, of

said yoke, a' pivot member the combination with a actuatingsaid plunger. to hold the latch 13., Ina device .ofthe characterdescribed,

the guard carrying lever the combination with 'aguard carrying lever, of a press controlling lever and a closed 1h rough voke carried by one of said, levers and which the ther of. Said levers..- passes.v v

14. Ina device of the character described,

ver, ofa press-controlling lever, a closed yoke carr ed by one 'ofsald levers' and through" which thebthQr of [said levers the combination, with: a guard carrying-1d? passes, and an adjustable member carried by passes throughv said yoke contacts.

15. Ina the. combination with a said yoke and' with which the leverfi'th'ati I 7.0- devide of the characterde'scribed,

guard ca rryingule a-press controlling lever, a yoke can ried by; the press controlling lever and through which the guard carryingdever passes, a catch, a Wearing insert seated. in; passing through said insert and through said catch, said.

guard carrying member said yoke, and a spring ried by said said catch.

16. In a device; of the character described,

pressed plunger caryoke and arranged to actuate ber, of a press controlling lever, springsfor actuating sald levers, a. member for 'actuatlng' carried [by the press. "controlling lever through WhlCll' the guard carry ng lever passes, a-vertically adjust-able member can ried y and forming apart of said yokea-nd with which the guard carrying lever cona.

upon I said yoke,- a 9; for actuating said I '.-in position to en 3 ying' lever" during' the time that they latch ,is in position release)? I .100 Signed at Hamilton, Ontario-, I( lanada,-

tacts, a latch U mounted spring "pressed plunger, engaged with said atch and a stopmember gage the guard can the press.

this 15th day of June,1'912.,:

manually operable the guard carrying. =lever against the tension'of itsspring, a yoke passing through guard carrying mem- JAMES MELyI -"Jonn's.

' -Inl'the presence,of'-

,ERTIE NIo 'ioLsoN, v 'ALro n- T. BRATTO J;

Copies of this patent may be obtained for five cents each, by'addressing the Commissioner of Patents; 

